1. One kilojoule (kJ) is equal to 0.239 kilocalorie (kcal).2. One kilocalorie (kcal) is equal to 4.184 kilojoules (kJ).3. "Cal" is an abbreviation for calorie, which is the amount of heat required to raise the temperature of 1 gram of water by 1 degree Celsius at standard atmospheric pressure.4. Joule (J) is the metric unit of heat, commonly referred to as "joule," named after the British physicist James Prescott Joule.5. Large calories, also known as kilocalories, are used to measure the amount of heat energy in food and drinks. They are related to other units of heat energy, such as kilojoules, calories, and joules.6. One calorie (cal) is equal to 1 cal, and one joule (J) is approximately equal to 0.239 calories.7. One kilocalorie (kcal) is equal to 1000 calories (cal), or 4184 joules (J), or 4.184 kilojoules (kJ).8. Therefore, one kilocalorie (kcal) is equivalent to 4.184 kilojoules (kJ), which is also equal to 1000 calories (cal).